[audiothrowaway]

In regards to the B-format processing, if it’s got DSP it would not be hard to implement, it’s simple matrix math. I would be happy to give them the filter set for the AMBEO VR Mic.

But there are a range of mixers on the market, not as beautiful, from Zoom (F4 and F8) and SoundDevices (MixPre 6, 8, 10) that have integrated A to B format converters. With the SoundDevices also having a binaural renderer integrated into the headphone out.

The larger issue is the one you have already identified, the lack of pre-amps. IIRC the field mixer they sell does contain preamps and DSP, but unsure if it can provide 48v that most Ambisonics mics from any manufacturer will require.

EDIT: In looking at the site for the field mixer they make [0] it appears it doesn’t have pre-amp except for a headset input. I was confused because their large diaphragm condenser that they have coming out will absolutely require a pre and power to operate, but it looks like it has an 3mm out with integrated battery operated pre-amp in addition to XLR and 48v phantom. [1]

[0]https://teenage.engineering/store/tx-6/

[1]https://teenage.engineering/store/cm-15/

[aaroninsf]

There are people doing Ambisonics 4-channel recording with electrets, so phantom is not necessarily required...

Core now does second-order...

https://www.core-sound.com/products/octomic